Thermostatic regulator.



G. H. 'STENBERG. THERMOSTATIC REGULATORIV APPLICATION FILED SEPT. 27. 1912.

Patented sept, 30,1913.

n QNN CHARLES HENRY srnNBEao, or'ELLswonrH, IOWA.

Specicaton of Letters Pate-nt.

Patented Sept. 30, 1913.

Application filed. September 2f?, 1912. Serial No. 722,758.

T o @ZZ whom t mag/concern: l

Be it known that I, CHARLES HENRY STENBERG, a citizen of the United States, residing at Ellsworth, in the county of Hamilton and State of Iowa, have invented a new and useful Thermostatic Regulator, of which the following is a specification.

The object of my invention is to provide a thermostatic regulator ofsilnple and inexpensive construction 'arranged and constructed to control the inflow of heated air to an incubator or the like.

A furtherobject is to provide such a device provided with means whereby the inflow of hot air is automatically regulated by the change in temperature of the air surrounding the incubator or the like as wel] as by the change of temperature within the incubator.

More particularly it is my object to proA vide means within and without an incubator or the like for regulating the temperature within the incubator which means lare' arranged to co-act with each other for controlling the iniiow l'of warm air to the interior of the incubator.

My invention consists in certain details in the construction, arrangement and com-bination of the various parts of the device, whereby the objects contemplated are attained, as hereinafter set forth, pointed out in my claims and illustrated in the accompanying drawings, in which- Figure l shows a vertical, Asectional view through a portion of an incubator equipped with a thermostatic regulator embodying my invention. Fig. 2 shows-a detail viewin 'section of the thermostatic disk outside the incubator, :and part of the mechanism adjacent thereto. Fig. 3 shows a detail sectional view of mechanism for mounting the rod which extends into the incubator to the thermostatic disk therein. F ig. 4 vshows a detail .section lview of the operation of .the rod 2o.

n the accompanying drawings I have used the reference numeral 1'0 to indicate the walls or frame of an incubator which may be of heat insulating construction. Mounted within the incubator and spaced apart hom the bottom thereof is an egg tray 11.

'-The incubator may be supported u on the legs 12 if desired. Secured 'tothe rame `is a Ibracket 13 upon which rests an ordinary .lamp 14: orother suitable source 'of heat. 'The chimney I5 of the lamp extends into a cylinder 16 which is open at its upper end. Communicating with the cylinder 16 is a warm air conducting tube 17 which extends into the incubator preferably above the egg tray 11 and is open at its inner end for the lpurpose of discharging warm air within the incubator.

The parts heretofore described are of or dinary construction and-of themselves form no part of my present invention.

Mounted on the top of the incubator frame 10 is an upwardly extending bracket 18 the upper end of which is preferably bifurcated thereby forming two` arms 19. Pivoted between the upper ends of the arms 19 is a rod 20. Pivoted to one end of the rod 2O is a downwardly extending 'rod 2l to the lower end of which is securedV a cap or cover 22 designed in one position of its movement to entirely 4close the upper end of the cylinder 16. Slidably mounted on the other end of the arm 20 is a weight 23 which may be secured in any position of its movement on the rod 20 by means .of a set screw 24..'

verted cone. I have provided in .the lever arm 26 a plurality of openings 26a' for mounting the screw 27 in different positions in the lever arm 26.

Mounted on the top of the incubator is a base or block 28 -having at its upper surface a socket or vertical .opening Received 'in the socket in the block is a downwardly extending lug 29 on a thermostatic disk "30 of ordinary construction. The lug 29 .is vertically adjustable within the socket in .the lblock 28 and maybe secured in any position .of its sliding movement by means -of a set screw 3l, mounted in the 'block 28,. On the upper'side .of the disk 30 is a 'block or llug 30a inthe upper surface of which .is a cavity shown by the dotted lines in Fig. 2. The pointed lower end of the screw '27 is received in the cavity in the ,block or lug 30 as shown by the dotted lines in Fig. 2. Thus it will be seen that one end of the lever arm.26 is supported by the disk 30.

Mounted .on the .upper side of the lever.

arm 26 is ablock'32. The .distance between the block 32 and the end ofthe arm 26 which carries the screw 27 y is preferably .greater 7155 by raising the lever arm 26-adraisingthethan the distance between said block 32 and vthe other end of the arm 26. The block 32 is mounted on the lever arm 26 by means of screws 33.l It will t-hen be seen that the position of the block 32 on the lever arm. 26 may be varied as desired. In this connection it is stated that the bracket 19 has at its lower Vendv a laterally extending flange 19aL which rests on the top of the incubator and is vsecured thereto by means of screws 19b so that said bracket may be secured to the incubator at different points for purposes of adjustment. Mounted in the rod 20 above the block- 32 is as crew 34, the'lower end of which is received in a socket in the block 32 as shown by the dotted lines in Fig. 1. On the lower surface of the lever arm 26 near the end opposite the screw 27 I have mounted bearings 35 by means of screws 36, and in the bearings 35 is rotatably mounted a round rod 37. Secured to the rod 37 between the bearings 35 is a downwardly extending 'rodl 38. It will thus be seen that the rod 38 is pivotally mounted on the lever arm 26 to move in 'a vertical plane. In the top of the incubator I provide an elongated opening 39. Above the opening 39 isa plate 40 hav-v mounted in the block 40 in the same way that the disk 30 is mounted in the block 28.4

On the upper surface' of the disk 41 is a lug or block 42 similar in construction to the block or lug 30a having at its upper surface a cavity in which is received the lower end of the rod 38. It .will therefore be seen that the ends of the lever arm 27 is supported by the disk 41 and 30. l

I will now describe the practical operation of my improved thermostatic regulator. As-

suming'that the parts are installed in position as heretofore described, the temperature within the incubator may be very accurately regulated by nieans 'of-my device. Assuming that the. lamp 14 is lighted for'heating the air in the cylinder 16, the parts are adjusted so that when the disks 30 and 41 are contracted and in their normal position, the

cover plate 22 will close the upper end ofthe cylinder 16 and cause the heated air therein When a certain rod 20. The cover plate 22 will thusv be raised above the cylinder 16 and the heated air in the cylinder will be perwarm air will be delivered to the incubator.

It is a well known fact that the air in the bottom of the incubator and in the top thereof varies considerably in temperature whenever the air outside the incubator is considerably higher or lower than the temperature of the air within the incubator. fore desirable that the discharge of warm air into the incubator be regulated to some extent to correspond to changes in the temperature of the airA outside theincubator. For effecting this regulation I have provided the thermostatic disk 3 0 and the parts connected therewith. It will be readily seen that the parts may be adjusted by means of the screws in the blocks 40 and 31 and by ivarying the position of the bearings 35 and the block 32 and the screw 34 to meet all ordinary variations in temperature. In this connection it is noted that I have provided in the rod 20, openings similar to the openings 26a in thelever arm 26 in which the screws 34 may be mounted in different positions. By selectively mounting the screw It is there- 27 in different openings 26a or selectively described. I am able to make adjustments to meet practically all conditions.

I claim as my invention.

`1. In a device of the class described, an incubator frame, a rod pivotally mounted above same,la lever arm operatively and adj ustably connected therewith, a disk mounted outside said frame operatively connected with said arm near one end thereof, a thermostatic disk mounted withinv said frame operatively connected with the other. end of said arm, one of said disks being adjustably mounted with relation to said arm.

2. In a device of' the class described, an incubator frame, a rod pivotally supported above said incubator frame, a lever arm above said incubator frame, means for operatively and adjustably connecting said rod and arm, said rod, a thermostatic disk adjustably mounted within said incubator.

the top of said-thermostatic disk, a thermo-- said incubator body, adjustable means,

whereby the upward movementof said lever arm raises said rst described rod, said rst described rod being so mounted that itis lowered byits` own weight when said lever arm is lowered, 'a thermostatic disk mounted within said incubator frame, a rod pivotally mounted on said lever arm and extending downwardly through the top of said incubator frame and rest-ing upon said thermostatic disk,. a. thermostatic disk outside the incubator frame, operatively connected with said leverarm, said last named disk being longitudinally adjustable with relation to said arm.

' 4, In a device of the class described, an incubator frame, a receptacle adjacent thereto, means for heating the air in said receptacle, means for conveying heated air from said receptacle through theinterior of saidA frame, said receptacle being open at its Vupper end, -a rod pivotally supported on said incubator frame, a cover -device pivotally mounted on said rod and designed in one position of the movement thereof to close the upper end of said receptacle, a lever armfabove said incubator frame, means I whereby the upward movement of said lever Y thermostaticfdisk, a thermostatic disk out-v arm raises said rst described rod,I first described rod being so mounted that it is lowered by its own weight when said lever arm' is lowered, a thermostatic disk mounted within said incubator frame, a rod pivotally mounted on said lever arm near one end and extending downwardly through the top of said incubator frame and resting upon said side the incubator frame below the other end of said lever arm, means for vertically adjusting said last named disk, and means whereby the expansionofjsai'd last nameddisk raises said lever arm.

-;5; In a device of the class described, an

incubator frame, a receptacle adjacent theref to, .means for heating lthe air in said receptacle, means for conveying heated air from sai-d receptacle through the interior of said "frame, said receptacle being open at its up- I per end, a rod pivotally supported on said incubator frame, a cover device pivotally -mounted on said rod and designed in one position of the movement thereof to close the upper end of said receptacle, a lever arm above said incubator frame, means whereby the upward movement of said lever arm raises said first described rod, said irst desc-ribed rod being so mounted that. it is lowered by its own weight when said lever arm is-lowered, a thermostat-ic disk mounted within-said incubator frame, means for adjusting said disk, a rodpivotally mounted `on said lever arm and extending downwardly through-the topof said incubator frame and resting upon said thermostatic disk, a thermostatic disk outside the incul bator frame below the'free end of said lever arm, and means whereby the expansion of said last named disk raises said lever arm.

6. In a device of the class described, an incubator frame, a receptacle adjacent thereto, means for heating the air in said receptacle, means forconveying heated air from said receptacle through the interior of said Iframe, said receptacle being open at its 'upper end, a'rod pivotally supported on said incubator frame, a cover device pivotally mounted on said rod and designed in one position of the movement thereof to close the upper end of said receptacle, a lever arm above said incubator frame, means whereby the upward movement. of said lever arm raises said rst described rod, said first described rod being so mounted that it is lowered by its own weight when said lever arm CHARLES HENRY STEN BERG.

Witnesses: C. B. ORWIG, L. ROBINSON. 

